Acquisitions, Pro Forma Financial Information (Details) - USD ($) $ / shares in Units, $ in Millions	3 Months Ended
Mar. 31, 2026	Mar. 31, 2025
2026 Acquisitions
Pro forma adjustments
Acquisition related cost per diluted share	$ 0.16
CommScope's Connectivity and Cable Solutions Business
Pro forma adjustments
Net sales	$ 7,707.7	$ 5,535.1
Net income attributable to Amphenol Corporation	$ 1,120.1	$ 496.8
Net income attributable to Amphenol Corporation per common share - Diluted	$ 0.87	$ 0.39
Total acquisition-related expenses	$ 222.3
Total acquisition-related expenses, net of tax	$ 181.0
Acquisition related cost per diluted share	$ 0.14
2025 Acquisitions
Pro forma adjustments
Acquisition related cost per diluted share		$ 0.06
Pro forma \| CommScope's Connectivity and Cable Solutions Business
Pro forma adjustments
Total acquisition-related expenses		$ 243.2
Total acquisition-related expenses, net of tax		$ 201.9
Acquisition related cost per diluted share		$ 0.16

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This element represents the total acquisition-related costs incurred, the components of which are recorded to either Cost of sales or separately reported in the income statement (below gross profit and a component of operating income) as acquisition-related expenses. These costs include, but are not limited to, external transaction costs, professional fees, amortization of acquired backlog and amortization of acquisition-related inventory step-up costs.

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Per diluted share amount, after tax, of pro forma income (loss) of combined entity as if acquisition date of business combination occurred as of beginning of period.

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Amount, after tax, of pro forma income (loss) of combined entity as if acquisition date of business combination occurred as of beginning of period.

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Amount of pro forma revenue of combined entity as if acquisition date of business combination occurred as of beginning of period.

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